• American 335 100% RTV Silicone  Shower Detail - American Bath Factory
  • American 335 100% RTV Silicone  Shower Detail - American Bath Factory
  • American 335 100% RTV Silicone  Shower Detail - American Bath Factory

American 335 100% RTV Silicone (NOTE): Can only be ordered and shipped with a shower kit

Regular price $10.00

Make sure you have the right tools to install your shower. Add the silicone to your shower or accessory order so that you don't have to search for it at your local store. Below is our recommended chart of how many you'll need. They are only estimates and you may need more or less depending on your individual installation.

How much silicone do you need?

  • 1 tube is great for maintenance or small items (bench/shelf)

  • 12 tubes are recommended for Neo or Corner Showers that are 36 x 36 or smaller

  • 18 tubes are recommended for Alcove, Neo or Corner showers that are  between 38 x 38 and 60 x 34 in size

  • 24 tubes are recommended for an Alcove shower that is 60 x 36 or Larger  

American ASI 335 Neutral Cure Silicone Sealant is a one-part, non-slump, moisture-curing RTV (room temperature vulcanizing) that cures to form a tough, high modulus rubber with long-term flexibility and durability. The neutral curing mechanism of ASI 335 is ideally suited for use in confined work areas since no objectionable odors are evolved. The non-slump characteristics of ASI 335 allow application to vertical or horizontal joints without flowing or sagging. ASI 335 neutral cure silicone has excellent resistance to weathering including ozone, ultraviolet radiation, freeze-thaw conditions and airborne chemicals. After cure, the wide heat stability range of ASI 335 is from -57°C to +204°C (-70°F to 400°F) and the sealant can be applied to surface temperatures from -18°C to +50°C (0°F to +120°F)


ASI 335 neutral cure silicone can be used as a durable sealant/adhesive in a wide range of industrial applications. Unprimed adhesion to a wide range of substrates is available with the use of ASI 335. For example, ASI 335 neutral cure silicone adheres to unprimed cement board or drywall, which other high modulus silicone sealants would require to be primed. As a formed-in-place gasket, ASI 335 exhibits low swell, low compression set and good oil resistance. These characteristics impart an unusual balance of properties to ASI 335 to prevent leakage in harsh environments such as showers, engines, and water pumps.


ASI 335 neutral cure silicone is ready to use and requires no mixing or additives. The cure mechanism begins as soon as the sealant comes in contact with the air. At conditions of 25°C (77°F) and 50% relative humidity, the sealant will skin in 10-20 minutes and cure in 24 hours (1/8″ bead), with full cure strength in 7 days. Higher humidity accelerates cure. Tooling should be done before skinning takes place. In applications where partial or total confinement of sealant is prevalent, the time required for proper cure is generally lengthened by the degree of confinement.


Provided that all bonding surfaces are clean and dry, ASI 335 neutral cure silicone has excellent unprimed adhesion to most substrates. If there is any doubt about contamination, surfaces should be solvent wiped with oil-free solvents, such as xylol, toluol, naphtha or non-flammable chlorinated solvents. Do not solvent-wipe with oil-based solvents such as Varsol.


Priming for ASI 335 neutral cure silicone is normally not required for application to most substrates. Unprimed adhesion can be readily tested by applying a small trial bead and allowing 7 days for maximum adhesion to occur. ASI 335 has excellent unprimed adhesion to many substrates as shown in the adhesion chart.


ASI 335 meets the requirements of MIL-A-46106, Type 1.

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